Pay Your Bill Over the Phone. Anyone looking to pay National Grid by way of telephone simply has to call the company’s pay-by-phone automated system. The number to dial is (800) 233-5325.How to pay National Grid?
National Grid provides a self-addressed envelope with each month's bill. To pay your bill by mail, simply mail your check or money order, along with the paper bill stub, to the address on your envelope. If paying by check, make sure to write your account number on the back, and make the check out to "Electricity and Gas payments".How do I pay my National Grid online?
Customers can pay a National Grid bill online by visiting the official National Grid website and setting up a one-time bill payment through their checking or savings account or through Western Union Speedpay by debit or credit card.What is National Grid customer number?
The customer support phone number of National Grid Contact is 0800 111 999, for speech and hearing impaired: 0800 371 787 (Click phone number to call).